Xo. 38. 

 CALAMAGROSTIS CRASSIGLUMIS Thurb. Hot. Gal. ii. 281. 



Plant perennial, tufted, witli rather strong rootstocks. 



Culm erect, simple, smooth, rather stout, rigid, 10 to 15 inches high. 



Leaves from the base and of sterile shoots numerous, 2 to inches long. Leaves 

 of culm 2 or 3; sheaths loose, striate, smooth, exceeding the internodes; blades 

 divaricate, involute toward the acute points, thick, striate, hispid above, smooth 

 beneath, 2 to 4 inches long; ligules obtuse, £ line long or less. 



Inflorescence a rather dense, almost spicate, erect panicle, 2 inches long, deep pur- 

 ple; rays glomerate, unequal, less than £ inch long, crowded nearly or quite to the 

 base with short-pediceled spikelets. 



Spikelets turgid, acute, 1£ to 2 lines long; empty glumes broadly lanceolate or 

 lance-ovate, abruptly pointed, subcartilaginous, with thin margins, hispidulous through- 

 out, hispid on the nerves, 2 lines long or less; first glume 1-nerved (rarely 2-nerved); 

 second glume 3-nerved; floral glume oblong-ovate, toothed at the obtuse apex, rather 

 thick, minutely hispid, 5-nerved, 1£ lines long; hairs of the callus and of the short, 

 linear rudiment § as long as the glume; awn attached at the middle or below, equaling 

 or slightly exceeding its glume; palet oblong, bidentate at the apex, 2-nerved, about 

 1 line long; lodicules 2, i>ersistent, broadly lanceolate, thin, nearly £ line long. 



Plate XXXVIII; a, empty glumes enlarged 5 times; i, floral glume, dorsal 

 view, partly unrolled; c, lodicules, stamens, pistil and ventral view of floral glume 

 spread out. 



Swamps northern California to Washington and Vancouver Island. The northern 

 specimens are taller and larger. 



